Azeotrope-like solvent composition and mixed solvent composition

Abstract

To provide a solvent composition capable of removing soils such as dusts and oils attached to the surface of an article made of an acrylic resin or an article coated with an acrylic resin, without damaging it. An azeotrope-like solvent composition comprising from 38 to 41 mass % of (2,2,2-trifluoroethoxy)-1,1,2,2-tetrafluoroethane and from 59 to 62 mass % of perfluorohexane. A mixed solvent composition comprising from 30 to 60 mass % of (2,2,2-trifluoroethoxy)-1,1,2,2-tetrafluoroethane and from 40 to 70 mass % of perfluorohexane.

Description

TECHNICAL FIELD [0001] The present invention relates to solvent compositions to be used for removing soils such as oils and dusts attached to the surface of articles, e.g., electronic components such as IC, precision mechanical parts, glass substrates, molded-resin parts, etc. BACKGROUND ART [0002] Heretofore, in the precision mechanical industry, the optical instrument industry, the electrical and electronics industry and plastics industry, halogenated hydrocarbons have been known as solvents used for precision cleaning to remove soils such as oils, dusts, etc. attached to the surface of articles during manufacturing processes or the like. [0003] However, since halogenated hydrocarbons such as chlorofluorocarbons or hydrochlorofluorocarbons have ozone depleting potential, researches to develop solvents that can substitute such halogenated hydrocarbons have recently been conducted, and hydrofluoroethers (hereinafter referred to as HFEs) are known as the solvents. HFEs have advantage...

AI Technical Summary

Benefits of technology

[0016] The azeotrope-like solvent composition and the mixed solvent composition of the present invention have a small effect on e.g. an acrylic resin. Accordingly, in a case where these solvent compositions are used for cleaning articles made of an acrylic resin or articles coated with an acrylic resin, these articles can be cleaned without haze or cracking.

[0017] Further, the azeotrope-like solvent composition and the mixed solvent composition of the present invention can readily remove contaminants such as oils, dusts, particles and resin shavings, droplets of a solvent having a high surface tension and a small specific gravity, water droplets, etc, attached to the surface of articles to be cleaned.

Problems solved by technology

Generally, since HFEs have low solvency to oils as compared with the halogenated hydrocarbons, there has been a problem such that HFEs are difficult to be used as cleaning agents in place of the halogenated hydrocarbons.

However, in a case where an article to which Panasate 810 is attached is cleaned by using (2,2,2-trifluoroethoxy)-1,1,2,2-tetrafluoroethane, if the article is comprised of an acrylic resin or coated with an acrylic resin, there have been problems such that haze or cracking occurs on the surface of the article, and dissolution of the acrylic resin occurs.

However, since the compositions disclosed in Patent Document 1 have significant effects on several resins such as an acrylic resin, there has been a problem such that in a case where an acrylic resin or an article coated with an acrylic resin is contacted with the compositions, haze, cracking or dissolution of the acrylic resin occurs.

Further, a perfluorocarbon such as perfluorohexane is also a compound having zero ozone depleting potential, but if it is used as a cleaning agent for e.g. oil, cleaning fails because its cleaning performance is insufficient.